X-Ray and Neutron Diffraction Studies in Spinel Fe_2MoO_4
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概要
- 論文の詳細を見る
Stoichiometric sample of Fe_2MoO_4 was prepared in a controlled atmosphere of CO_2-H_2 mixed gas at 1140℃ (log P_<o2>-P_<o2>∼-12.5). The crystal structure and the cation distribution were determined from, X-ray and neutron diffraction measurements on the powdered samples. Fe_2MoO_4 is a completely inverse spinel; the parameters are given as a=8.509 Å and u=0.383±0.003. The compound shows a week spontaneous magnetization (0.15∼0.2 μB/mol) below 348 K (Neel point), and the spontaneous magnetization changes sign at about 160 K (compensation point). The magnetic structure was determined to be Neel type like Fe_<2+>(4μ^^⇾B) [Fe^<2+>(4μ^^⇾B)Mo^<4+>(0_<μB>)]0_4, where (4d)^2 electrons of Mo^<4+> ion are in low spin state, and the origin of the weak spontaneous magnetization is attributed to the uncompensation and/or canting of spins of Fe_<2+> ions on the A and B sites of the spinel lattice.
- 社団法人日本物理学会の論文
- 1972-11-05
著者
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ABE Masanori
Department of Community Medicine, Ehime University Graduate School of Medicine
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NOMURA Shoichiro
Department of Physical Electronics, Faculty of Engineering, Tokyo Institute of Technology
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Abe Masanori
Department Of Physical Electronics Tokyo Institute Of Technology
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Nomura Shoichiro
Department Of Physical Electronics Faculty Of Engineering
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Abe Masanori
Department Of Anesthesiology Faculty Of Medicine University Of The Ryukyus
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Kawachi Masao
Department Of Physical Electronics Tokyo Institute Of Technology
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Kawachi Masao
Department Of Physical Electronics Faculty Of Engineerring Tokyo Institute Of Technology
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Nomura Shoichiro
Department Of Physical Electromics Tokyo Instiute Of Technology
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Nomura Shoichiro
Department Of Physical Electornics Faculty Of Engineering Tokyo Institute Of Technology
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ABE Masanori
Department of Physical Electronics, Tokyo Institute of Technology
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